Cold Recycling of asphalt pavement is a tried and tested method of recycling that can yield significant savings in labor and materials, greatly reduce a project's negative impact on the environment, and provide a sustainable answer to the problem of asphalt concrete maintenance. The old layer that has sustained damage must be removed to ensure an even bond when the new asphalt is applied, and to maintain a level surface. Milling - Milling asphalt is a method of resurfacing asphalt using a milling machine to grind down the top course of existing asphalt (typically 1.5” depth).
When the cut-back asphalt is used for paving or construction, the volatile element evaporates when exposed to air or heat, leaving the hard asphalt cement. U.S. Department of Transportation, Federal Highway Administration, "Hot-Mix Bituminous Paving Manual," December 1984.
Aggregates used in asphalt mixtures (hot mix asphalt, cold mix asphalt, surface treatments) comprise approximately 95 percent of the mix by mass. It is also used Driveway Paving as the base layer in PCCP or asphalt paving systems. It is obviously desirable to provide a smooth and level surface in the construction of a road.
Any excess amount will dissolve the asphalt films on the aggregate particles, thus contaminating the mix. Usually, these types of buildings have a gravel or dirt floor, but a concrete floor can be added either before or after the construction of the main building.
Concrete paved surfaces are not compressed and compacted like asphalt is, rather the concrete adheres and fills voids and irregularities with the soil and subgrade beneath it. Because concrete is a harder surface that does not have as much give as asphalt, expansion joints are cut into the surface to help prevent cracking from seasonal expansion.
Those factors will help the PLM project manager determine the most appropriate material and methods to utilize. The whitetopping process uses Portland cement concrete to resurface a distressed asphalt road. As one of the leading asphalt paving contractors in Austin and Central Texas , Alpha Paving is ready and able to assist you with all your pavement-related needs.